| Characteristics of response spectra for long-periods of main-shock recordings of the Chi-Chi earthquake |
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| 作者姓名： | 陈勇 俞言祥 |
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| 作者单位： | Institute of Geophysics China Earthquake Administration，Institute of Geophysics China Earthquake Administration，Beijing 100081 China Beijing 100081 China |
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| 基金项目： | National Natural Science Foundation of China Under Grant No.40374017 |
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| 摘 要： | Current practice uses predictive models to extrapolate long-period response spectra based on far-field recordings in moderate and weak earthquakes. However, the spectra are not long enough and the data are often not reliable, which means that the seismic design code cannot accurately define seismic design requirements for long-period structures. The near-field recordings in the main-shock of the Chi-Chi earthquake have a large signal-to-noise ratio (SNR), which makes them suitable for studying the long-period acceleration response spectrum up to 20 sec. The acceleration response spectra from 246 stations within 120 km of the causative fault are statistically analyzed in this paper. The influence of distance and site conditions on long-period response spectrum is discussed, and the shapes of the amplification spectra are compared with the standard spectra specified in the seismic design code of China. Finally, suggestions for future revisions to the code are proposed.
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| 关 键 词： | 地震 数据分析 信号 特征 |
| 文章编号： | 1671-3664（2007）02-0111-11 |
| 收稿时间： | 20 April 2006 |
| 修稿时间： | 2006-04-202006-10-12 |
Characteristics of response spectra for long-periods of main-shock recordings of the Chi-Chi earthquake |
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| Chen?Yong,Yu?Yanxiang.Characteristics of response spectra for long-periods of main-shock recordings of the Chi-Chi earthquake[J].Earthquake Engineering and Engineering Vibration,2007,6(2):111-121. |
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| Authors: | Chen Yong Yu Yanxiang |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | Current practice uses predictive models to extrapolate long-period response spectra based on far-field recordings in moderate and weak earthquakes. However, the spectra are not long enough and the data are often not reliable, which means that the seismic design code cannot accurately define seismic design requirements for long-period structures. The near-field recordings in the main-shock of the Chi-Chi earthquake have a large signal-to-noise ratio (SNR), which makes them suitable for studying the long-period acceleration response spectrum up to 20 sec. The acceleration response spectra from 246 stations within 120 km of the causative fault are statistically analyzed in this paper. The influence of distance and site conditions on long-period response spectrum is discussed, and the shapes of the amplification spectra are compared with the standard spectra specified in the seismic design code of China. Finally, suggestions for future revisions to the code are proposed. |
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| Keywords: | long-period main-shock recordings Chi-Chi earthquake signal-to-noise ratio acceleration response spectrum amplification spectrum |
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